What are the three rational numbers between 1/4 and 2/5

Plz ( true - false) all triangles have interior angles whose measure sum to 90.

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.

Ethan is proving that the slope between any two points on a straight line is the same. he has already proved that triangles 1 and 2 are similar. drag statements and reasons to complete the proof.